1) Gas analysis
真空全脱气装置
2) vacuum
真空
1.
Study on regeneration of ethanol-loaded activated carbon by microwave irradiation under vacuum condition;
载乙醇活性炭真空微波解吸实验研究
2.
The research of far-infrared drying of carrot under vacuum conditions;
胡萝卜远红外真空干燥试验参数的研究
3.
Effects of overlap steps on oxygen production by vacuum pressure swing adsorption;
重叠步骤对真空变压吸附制氧性能的影响
3) vaccum
真空
1.
The influence factors on the polyester polycondensation vaccum system and their treatment;
影响聚酯缩聚真空的因素及处理
2.
Different type of vaccum pump and its combination used in existing polyester plant were introduced,also the economic analysis was done.
介绍已有的聚酯装置中所使用的不同形式的真空泵及组合 ,并对其进行经济分析。
3.
Introduced are four displacing methods, namely complete mixing, non-mixing, vaccum deaeration, and pressure displacement.
介绍了常用的四种置换方法,即完全混合置换、无混合置换、真空置换和加压置换。
4) vacuum brazing
真空钎焊
1.
The craft and application of vacuum brazing for honeycomb material;
蜂窝材料的真空钎焊工艺及应用
2.
Influence of active element Mg on joint properties of aluminum alloy vacuum brazing;
活性元素镁对铝合金真空钎焊接头性能的影响
3.
Morphology of carbide on diamond interface by vacuum brazing;
真空钎焊金刚石界面碳化物的形貌
5) vacuum distillation
真空蒸馏
1.
Industrial experiment on recovering metals from waste zinc-tin alloy by vacuum distillation;
真空蒸馏法从废杂锌锡合金中回收金属的工业试验
2.
Cadmium recovery process and modeling in the Ni-Cd batteries by vacuum distillation;
真空蒸馏回收镍镉电池中镉金属工艺优化模型研究
3.
Purification of γ-irradiated 30 % TRPO-ke rosene by vacuum distillation;
真空蒸馏净化辐照后的TRPO煤油体系
6) vacuum frying
真空油炸
1.
The best processing technology of crispy sweet potato by the method of vacuum frying;
真空油炸甘薯脆片的研究
2.
The manuscript studied the effects of color preservation technology on quality of vacuum fried potato chips by using pretreatment technology before vacuum frying.
采用真空油炸前预处理技术研究了护色工艺对真空油炸马铃薯片品质的影响。
3.
Effects of two pretreatment, combined with vacuum frying on the moisture content, fat content and color value of fried green soy bean were studied.
研究了2种预处理工艺结合真空油炸对毛豆水分质量分数、脂肪质量分数和色差的影响。
参考词条
补充资料:钢液真空脱气
钢液真空脱气
vacuum degassing
一原因是反应动力学的因素。 (马廷温)gangye Zhenkong tuoqi钢液真空脱气(vaeuum degassing)钢液在真空条件下脱去其中的氢和氮的过程。它是钢液真空处理的主要应用。钢中气体主要是氢与氮。它们是炼钢过程中溶入钢液的,对钢材性能危害很大。钢液凝固过程中氢析出时要造成气泡、白点、发纹及钢锭上涨等缺陷。而未被析出的氢会降低钢的强度极限、断面收缩率、延伸率和冲击韧性。钢中的氮会产生钢的时效脆化,降低钢的冲击韧性及引起钢的冷脆。 气体在钢液中溶解时服从平方根定律,即气体的溶解度与钢液上方该气体的分压力的平方根成正比: 合HZ一:H〕△G。一36475十30.46二 1__二_1_-红组一_一〕』卫互__1二nl lsK一19戎一丫一“591式中火闭为以%表示的钢中氢浓度,以Fe一H系无限稀溶液为基准的活度,因介、1,故a[闭、[%H],从而得出氢在铁液中的溶解度与其在同铁液中平衡的气相中分压的关系: 仁H〕一K。瓶同理,对氮也得到同样的关系式: 仁N〕一KN低由于在气体溶解反应过程中,气体的摩尔数有变化,当温度一定时,液态金属上面气体分压力变化可以引起平衡的移动,即金属中气体平衡浓度的变化。例如,当温度为1600℃时,KH=0.0025,KN=0.04。与含氢2火.1J6和含氮0.003%的金属平衡时,气相中氢和氮的分压(atm)为 ,rH]、。,0.0002、。 PH。=(气梦曰)‘一(云气蓉;嚣)乙=0.0064 了‘犯、KH、0 .0025即户HZ一648·spa~一,「N]、。,0 .003、,l司理pN。=(气乡州)‘=(长六汀二)‘~0 .0056交atm),”~了‘、2、KN/、0 .04/v’”““”、“‘一‘了即户NZ一567.4pa 可见,从热力学平衡角度,使铁液中的含氢量和含·氮量降低到较小数值,并不需要在熔池上面保持很高的真空度,保持几百帕(几毫米汞柱)的压力,就能使钢液中溶解的气体含量降到相当低的水平。真空脱气设备的极限真空度多选在67Pa(0 .smmHg)以下,即可以使钢中气体含量降到很低。而实践证明,钢和合金经各种不同形式的设备处理后,能达到良好的脱氢效果,而真空脱氮则比较困难。导致脱氮困难的原因:一是钢中常含有强氮化物生成元素,使氮处于化合物状态;另
说明:补充资料仅用于学习参考,请勿用于其它任何用途。